function zb(tbl){
	var course=dao.fetch("course",Cnd.where("id","=",tbl.id))
	var chapters=$list("chapter",Cnd.where("tbl_name","=","course").and("tbl_id","=",tbl.id).and("pid","=",0))
	chapters.forEach(function(c){
		c.put("list",$list("chapter",Cnd.where("pid","=",c.id)))
	})
	attr("chapters",chapters)
	var video=dao.fetch("video",Cnd.where("video_id","=",31536832))
	attr("video",video)
	
	return course;
}